WPCM 2%.B pz W"S^11>bbu"::Dg1:11bbbbbbbbbb11gggbuuuk1Xubuukuuuk111Rb:bbXbb1bb''X'bbbb:X1bXXXX;.;g:=::m:::mmmmm::::::mm:k1mubububububXubububub11111111bbbbbbbbbuXubbkbuXmmmmumububXXXXbububububbmbbbbbb:k:k::=kmmX:uXb'b:b:b:b'bmbbbb:::uXuXuXuXk:k:k:mbbbmbuXkXkXKQmmmm^b:kbbbbmbA@mmbmmbmmmmmmm:b:mmmbbmmmmmmmmmmmmXXmmmmmmmmmmmmmmmmmmcm`m`mm`m:mmmmmm}}}mjjmmmmmmmmmmmmmmm0mm}mmmmmmmmmmmmmmmmmmmmmmm}Mmmmmmmmmmmmmjmmmtmmmmmmmmm`'mmm`mmjmlWmmmmmmmmmmmmmmmmmmmW`mmmmjmM-lvetica#|x`H1`D4PkCQMS PS Jet Plus /800 II QPJPII.PRSPl`D4PkCg2W_ qr|xHelveticaCourier@ ,`H1`D4PkCmQrrr r  @C2K ` X` hp x (#%'H   x|@  3'3'Standard6'6'StandardC6QMS $=R- Recommendation X.352 <INTERWORKING BETWEEN PACKET SWITCHED PUBLIC DATA NETWORKS <AND PUBLIC MARITIME MOBILE SATELLITE DATA TRANSMISSION SYSTEMS Hxxxxxx 2.HReferences I.112H Vocabulary of terms for ISDNs,  `  I.210H Principles of telecommunication services supported by an ISDN, I.230Series  Bearer Services supported by an ISDN, I.240Series  Teleservices supported by an ISDN,  F-ԌI.250Series  Definitions and description of Supplementary Services, I.340H ISDN connection types, I.411H ISDN usernetwork interfaces Reference configuration, I.420H Basic usernetwork interface, I.421H Primary rate usernetwork interface, I.500/I.510  Definitions and general principles for ISDN interworking, Q.700Series  Specifications of Signalling System No. 7, X.1H International user classes of service in public data H networks (PDNs) and ISDNs, X.2H International data transmission services and optional user H facilities in PDNs, X.10H Categories of access for data terminal equipment to public data L "HH "Htransmission services, X.20H 2.2HA public maritime mobile earth station calling another Hmobile earth station   HIf the two public maritime mobile earth stations are in the same ocean area or are in different ocean areas covered by the same MSDSE, the MSDSE sets up the call directly to the called public maritime mobile earth station so that only one MSDSE will be involved in the call. HIf the two public maritime mobile earth stations are in different ocean areas which are not both covered by the same MSDSE, the calling MSDSE will route the call in accordance with  2.1 above. defined within the public maritime mobilesatellite systems. Such abbreviated codes require conversion to the full international data number before the call can be forwarded from the MSDSE to a PDN. 3.HRouting of land originated calls to public maritime mobile Hearth stations  F-Ԍ HFurther, the first digit of the following Network Terminal Number in the public maritime mobilesatellite system is the "T" digit defined in Recommendation E.215/F.125 which is used for discrimination between different public maritime mobilesatellite systems. HA calling user can only indicate which ocean area and public maritime mobilesatellite systems (such as INMARSAT Standard A, B and C), type is addressed, and cannot select a specified MSDSE. Therefore each originating and/or transit network has normally to route data calls within one of the public maritime mobile system DNICs to a predetermined MSDSE which serves the ocean area and system type as indicated by the DNIC and T digital according to bilateral agreement between the administration of origin and the administration operating the MSDSE. Thus, analysis of five digits of the called number is required for routing purposes. another data number (but to the same public maritime mobile earth station), which only differs in ocean area, when a mobile earth station is absent from the ocean area indicated by the original data number. The rerouting of a call between the two ocean areas covered by the MSDSE should be carried out only once. HThe condition for rerouting is that the public maritime mobile earth station is included in the list of mobile earth stations and is not barred from incoming access. existing XSeries Recommendations and to the public maritime mobilesatellite system specifications and is therefore left for further study. Recommendation E.215/F.125 should be barred. Such addresses are public maritime mobile earth station numbers with a T digit 0. The call should preferably be barred in the network of origin. However, the MSDSE must in any case be capable of barring such calls. (See also Recommendation X.350). HThe link between the coast earth station and a public maritime mobile earth station is always a satellite link. HHence, for a call destined to a public maritime mobile earth station, all transit exchanges should recognize from the destination DNIC of 111S that the final link is a satellite link and perform routing so that the maximum permitted transit delay from the calling user to the called user is not exceeded.